Sunglasses with removable sealing member

ABSTRACT

Eyewear is disclosed for use in sports and the like which allows the wearer to attach a removable sealing member to prevent the ingress of particulate matter when active sports are engaged in which require both ventilation and sealing to keep dust, dirt and the like out of the eyes. The sealing member is removable so that when the user is engaged in more casual activities, the frame may be worn like ordinary glasses or sunglasses without the sealing member. The eyewear includes a frame shaped to fit a wearer&#39;s face, one or two lenses mounted in the frame, and a temple bracket mounted on each side of the frame. A ventilation opening can be provided on the front surface of the frame to provide an airstream which is channelled by the removable insert to provide a filtered airflow across each lens.

TECHNICAL FIELD OF THE INVENTION

This invention relates generally to eyewear for use in sports and thelike; and more particularly to eyewear which is ventilated to reduce orprevent fogging, increase comfort and protect from the wind.

BACKGROUND OF THE INVENTION

Eyewear used for sports is typically designed to wrap around the user'sface and sufficiently seal against the skin to create a dead air spacebetween the glasses and the user's face (hereinafter referred to as the“dead space”). As the user engages in strenuous activity, the heat andmoisture can build up in the dead space, making the glassesuncomfortable to wear and producing condensation on the inside surfaceof the lenses which can partially or entirely obstruct the vision of thewearer. This phenomenon is commonly known as “fogging.”

There have been many prior art methods attempted to reduce or eliminatefogging. Some devices, such as that described in U.S. Pat. No.4,707,863, describe chemical coatings which can be applied to the insidesurface of a lens to alleviate fogging. Such coatings, however, tend toenhance fingerprints caused by handling, and are typically not durable,tending to wear off when the user cleans the lenses.

Therefore, different types of ventilation have been relied upon toalleviate fogging. Many prior art sunglasses and protective glasses orgoggles provide openings in the frame above and below the lenses toallow air to flow in and out. These are not believed to be particularlyeffective at preventing fogging when a wearer is engaged in particularlystrenuous activity, since there is nothing to cause the air to actuallyflow through the dead space, unless the wearer tilts his head downwardtowards the ground as he is moving forward to allow the passing air toflow through the perforations in the frame. This is not particularlydesirable when the wearer is moving forward at great speed (for example,when riding a motorcycle) because such action will take the wearer'seyes off the space in front of his vehicle and may result in anunfortunate accident. Moreover, open apertures will typically allow theingress of dust and particulate matter into the dead space where it canbe blown into the unprotected eyes by the flow of air, which is alsovery undesirable.

U.S. Pat. Nos. 5,191,364 and 5,428,411 substantially reduced oreliminated the ingress of dust and particulate matter into the deadspace by covering the ventilation apertures with permeable foam, andfurther addressed the fogging problem with coated and/or double lenses.However, these glasses still suffer from the lack of a motivating forcefor causing a flow of air through the ventilating apertures withoutcausing the wearer to take his eyes off his direction of travel.Moreover, when the wearer is no longer engaged in active sports, andwishes to simply wear a pair of casual sunglasses to protect the eyesfrom the effects of sunlight while walking or driving in a closedvehicle, the foam surrounding the eyes combined with decreased airflowmay cause an uncomfortable heat build up which discourages the user fromwearing such eyewear for casual purposes.

British Patent Specification 364,970 addressed the problem ofcontrolling a flow of air through the dead space by providing a valvewhich may be adjusted by loosening a screw, rotating an inlet regulatingdisc to a desired position, and then tightening the screw. This deviceis not desirable because the user must remove the glasses, produce ascrew driver, loosen the screw, rotate the disc, tighten the screw, putthe glasses back on and use them at the desired speed to determine ifthe disc has been rotated to a position which will produce the desiredflow under the specific conditions of use. If not, the procedure must berepeated over and over again until the desired flow is obtained.

Accordingly, the need exists for sunglasses and protective glasses whichautomatically generate a flow of filtered air through the dead space andprotects the eyes from particulate matter in the airstream when the useris engaged in active sports, and in which the seal which filters andprotects the eyes can be removably detached when desired for casualwear.

SUMMARY OF THE INVENTION

In one embodiment, the present invention provides eyewear for use inboth sports and casual activities having a frame shaped to fit awearer's face, the frame including an inner surface, an outer surface, alens mounting surface mounting a lens for protecting a wearer's eyes, anose bridge for supporting the frame on the wearer's face, a templebracket on each side of the frame for attaching a strap or temple barfor supporting the frame on the wearer's head, and a removable sealingmember having a front surface formed to closely engage the inner surfaceof the frame, one or more fasteners for removably attaching the frontsurface of the removable sealing member to the inner surface of theframe, and a gasket covering the rear surface of the removable sealingmember and ventilation openings for engaging a wearer's skin around theeyes to prevent or substantially alleviate the ingress of particulatematter.

In another embodiment, the present invention provides eyewear for use inboth sports and casual activities having a frame shaped to fit awearer's face, the frame having an inner surface, an outer surface, apair of orbital openings for surrounding the eyes of a wearer, a nosebridge connecting said pair of orbital openings, the nose bridgeincluding a ventilation opening containing air permeable foam forpreventing the ingress of particulate matter, a lens mounting surfacemounting a lens over each orbital opening, a temple bracket on each sideof the frame for attaching a temple bar or strap end for supporting theframe on the wearer's head, and a removable sealing member having a pairof orbital openings connected by a nose bridge of substantially the samesize and shape as the orbital openings and nose bridge of the frame, afront surface formed to closely engage the inner surface of the frame,one or more fasteners for removably attaching the front surface of theremovable sealing member to the inner surface of the frame, a channelformed in the nose bridge of the removable sealing member and alignedwith the ventilation opening of the frame when the sealing member isattached to said frame, the channel for diverting an airflow from theventilation opening across an inner surface of each lens, and a gasketcovering the rear surface of the removable sealing member for filteringventilation apertures and engaging a wearer's skin around the eyes.

Other and further objects, features, advantages and embodiments of thepresent invention will become apparent to one skilled in the art fromreading the Detailed Description of the Invention together with thedrawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective front view of eyewear of the present invention;

FIG. 2 is a perspective top view of the eyewear of FIG. 1;

FIG. 3 is a bottom view of the eyewear of FIG. 1;

FIG. 4 is a side view of the eyewear of FIG. 1;

FIG. 5 is a perspective front view of the eyewear of FIG. 1 showing thedetachable sealing member;

FIG. 6 is a front view of a detachable sealing member of the presentinvention;

FIG. 7 is a back view of a detachable sealing member of the presentinvention; and,

FIG. 8 is a top view of a detachable sealing member of the presentinvention.

DETAILED DESCRIPTION OF THE INVENTION

As shown in FIGS. 1-5, eyewear of the present invention includes a frame10, which is preferably formed from a resilient material such asplastic. Metal frames, while less desirable, can also be used. The frame10 includes an aperture for the eyes of the wearer which iscircumscribed by a lens mounting surface 12, on which one or more lenses14 are mounted. Lenses 14, 14′ are conventionally mounted to the lensmounting surface, and may be tinted or coated to provide protectionagainst the rays of the sun, and/or may be corrective lenses to correctthe vision of far-sighted or near-sighted wearers. Most preferably, theframes 10 are provided with two eye apertures, a right eye aperture 15′aligned with the wearer's right eye and a left eye aperture 15 alignedwith the wearer's left eye. However, the frame may also be constructedto provide a single aperture for both eyes, which is covered with asingle lens, as shown in U.S. Pat. No. 6,233,342 which is incorporatedherein by reference. Frame 10 is most preferably curved to closely fitagainst the wearer's face and to provide for substantially unobstructedperipheral vision.

Frames 10 are also preferably provided with a nose bridge 17 to supportthe eyewear on the bridge of the user's nose. Nose bridge 17 provides aconvenient location on the front surface of the frame 10 which can beperforated for ventilation. In the preferred embodiment, shown in FIG.1, a single ventilation opening 18 is provided which is covered on theouter surface 19 by a perforated vent cover 20. The opening 18 can befilled with a filtering media, such as, for example, air permeable foam21 for filtering the air as it passes through ventilation opening 18.Other media suitable for filtering particulate matter from air may alsobe used. However, air permeable foam is preferred because of its lightweight. A similar vent cover can be mounted on the inner surface 23 ofthe frame 10 for trapping the filter 21 between the two vent covers 19,19′.

The inside of frame 10 is most preferably provided with a removablesealing member 42 contoured to fit a wearer's face closely while spacingthe lenses from the wearer's face to create a dead space between theuser's eyes and the lenses. Sealing member 42 is preferably coveredabout its periphery with a gasket 45 to provide a comfortable, cushionedseal around the wearer's face. Gasket 45 is preferably formed from airpermeable foam, but may also be formed from nonpermeable foam, ortextile like material. Most preferably, as shown in FIGS. 6 and 7, thegasket 45 is formed in a single, wrap-around piece to surround andcushion the user's face around the eyes, and the material preferablyused is air permeable foam. As used in this application, the term “wraparound gasket” means a substantially unbroken expanse of cushioningmaterial which wraps from the edge of the front surface 43 adjacent tothe orbital opening 51 across the rear surface 44 to the outer periphery58 of the sealing member 42, as shown in FIGS. 6 and 7.

Sealing member 42 is preferably constructed from the same material asthe frame 10 and most preferably is constructed from a flexible materialto allow for easy insertion and removal. Sealing member 42 is provided afront surface 43 which abuts the inside of frame 10, and a rear surface44 which is preferably covered with gasket 45 to comfortably sealagainst the user's face and prevent the ingress of dust and particulatematter through the space between the periphery of the glasses and theuser's face. Fasteners can be used to allow for attachment and removalof the sealing member 42 to and from the frame. For example, locatorpins 47, 47′ and/or tabs 48, 48′ are preferably provided which fit intocooperating recesses provided on the inside of frame 10. In addition,attachment tabs 49, 49′ are preferably provided at each end of sealingmember 42 for securing the front surface 43 of the sealing member 42against the inside of frame 10. As shown in FIG. 5, to attach thesealing member, an attachment tab 49′ can be slid into slot 23′,preferably located on the right side of frame 10, locator pins 47, 47′and tabs 48, 48′ pushed into their receiving recesses on the inside offrame 10, and the sealing member 42 is flexed to slide attachment tab 49into position in slot 23, preferably located on the left side of frame10. The curvature of the sealing member 42, and angle of attachment tab49, 49′ and receiving slots 23, 23′ hold the sealing member 42 securelyagainst the inside surface of frame 10. To remove sealing member 42, theuser need only grasp the sealing member 42 adjacent to one of theattachment tabs 49, 49′ and pull to disengage one end, whereupon theentire sealing member 42 can be easily removed. While less preferred,any other conventional fasteners useful for removable attachment canalso be used, such as, for example, studs for engaging keyed slots,conventional threaded fasteners, sliding fasteners, rotating fasteners,latches, and the like.

A channel 46 is preferably provided on the front surface 43 of thesealing member when the sealing member 42 is used with the preferredembodiment shown in FIG. 1 having a ventilation opening 18 for divertingthe flow of air traveling through the ventilation opening 18 and foam 22across the inside surfaces of lenses 14, 14′. When so provided, channel46 should be aligned with the ventilation opening 18 when sealing member42 is attached to frame 10. Ventilation openings 50, 50′ may also beprovided in the top and/or bottom of the sealing member 42 whereby theair stream moving through the ventilation opening 18 is diverted bychannel 46 across the inner surface of lenses 14, 14′ to alleviatefogging, and out of the dead space through ventilation openings 50, 50′which extend from the edge of the orbital openings 51 to a peripheraledge of the sealing member 42. Most preferably, ventilation openings 50,50′ are covered on the inside by gasket 45.

A pair of temple bars 52, 52′, shown in FIGS. 1 and 2, or an adjustableelastic strap (shown in U.S. Pat. No. 6,233,342 incorporated herein byreference), can be conventionally used to support the frames 10 on theuser's head. The rear surface of temple bracket 16, 16′ respectively,provides a convenient surface for connecting the temple bars 52, 52′ orstrap to the frame. Temple bracket 16, 16′ need not be a separatestructure, but may simply be the end portion of the frame to which thetemple bars 52, 52′ or strap can be attached. Temple bars 52, 52′ arepreferably connected conventionally to the frame to allow the bars 52,52′ to pivot around a hinge pin 54, 54′ for selectively folding the bars52, 52′ to a closed position towards the inner surface of the frame orto an open position for mounting on the wearer's head in the well-knownconventional fashion. Temple bars 52, 52′ may be permanently mounted forsuch pivoting movement, or may be removably mounted using well-known,bayonet type mounts which allow for removal of the temple bars 52, 52′and replacement by a strap. Likewise, a strap may be permanently orremovably mounted to the rear surface of temple bracket 16, 16′. Thelength of the strap can be conventionally adjusted using a buckle orother adjustment means to provide a snug fit against the wearer's face.

In use the present invention is particularly advantageous to users whowish to use the same pair of sportsglasses for vigorous activities, suchas skiing, which involve speed, and thus require both ventilation andprotection against airborne particulate matter, and for casualactivities where protection against airborne particulate matter is notcritical and where it may not be desirable to wear sportsglasses havinga seal around the user's face. For vigorous activities involving speed,the user simply inserts the sealing member 42 to the frame as describedabove. As the user moves, air is directed through ventilation opening18, where any particulate matter is trapped by the filter 22. As the airpasses through ventilation opening 18, it encounters channel 46 whichsplits the airstream in two, directing it to the right and the leftacross the inner surface of each lens. This airflow alleviates anytendency to fog and constantly changes the air in the dead space toprevent a buildup of heat or humidity as the user exercises. The airflowcan then exit through ventilation openings 50, 50′ When the user hasfinished the sporting activity, and returns to a more casualenvironment, she can remove the sealing member as described above andwear the frame as one would wear ordinary sunglasses. Air can still flowthrough the ventilation opening 18, but filter 22 prevents particulatematter from being blown directly into the eyes.

One skilled in the art will recognize at once that it would be possibleto construct the present invention from a variety of materials and in avariety of different ways. While the preferred embodiments have beendescribed in detail, and shown in the accompanying drawings, it will beevident that various further modification are possible without departingfrom the scope of the invention as set forth in the appended claims.

What is claimed is:
 1. Eyewear for use both in sports and casualactivities, comprising: a frame shaped to fit a wearer's face having aninner surface, an outer surface, a lens mounting surface for mounting alens means for Protecting a wearer's eyes, at least one lens mounted onsaid lens mounting surface, a nose bridge for supporting said frame onsaid wearer's face including a ventilation opening through said nosebridge, a temple bracket on each side of the frame for attaching a meansfor supporting the frame on the wearer's head and; and a removablesealing member having a front surface formed to closely engage the innersurface of said frame, a rear surface, one of more fasteners forremovably attaching the front surface of the removable sealing member tothe inner surface of the frame, and a gasket covering one or moreventilation openings and the rear surface of the removable sealingmember for engaging a wearer's skin around the eyes.
 2. The eyewear ofclaim 1 wherein said ventilation opening is filled with air permeablefoam to prevent the ingress of particulate matter.
 3. The eyewear ofclaim 2 wherein said removable sealing member includes a sealing membernose bridge for engaging said nose bridge of said frame, and whereinsaid sealing member nose bridge is provided with a channel aligned withsaid ventilation opening when said sealing member is attached to saidframe for directing a flow of air passing through said ventilationopening across each said lens.
 4. Eyewear for use both in sports andcasual activities, comprising: a frame shaped to fit a wearer's facehaving an inner surface, an outer surface, a lens mounting surface formounting a lens means for protecting a wearer's eyes, at least one lensmounted on said lens mounting surface, a nose bridge for supporting saidframe on said wearer's face, a temple bracket on each side of the framefor attaching a means for supporting the frame on the wearer's head; anda removable sealing member having a front surface formed to closelyengage the inner surface of said frame, a rear surface, one of morefasteners for removably attaching the front surface of the removablesealing member to the inner surface of the frame comprising a firstattachment tab at one end of said sealing member for engaging a firstrecess provided behind one of said temple brackets, a second attachmenttab at an opposite end of said sealing member for engaging a secondrecess provided behind the other of said temple brackets, and a locatormeans positioned between said first attachment tab and said secondattachment tab for engaging a cooperating structure provided on saidinner surface of said frame, and a gasket covering one or moreventilation openings and the rear surface of the removable sealingmember for engaging a wearer's skin around the eyes.
 5. The eyewear ofclaim 4 wherein said locator means includes a first locator pinpositioned to engage a first locator recess on said inner surface ofsaid frame to one side of said nose bridge and a second locator pinpositioned to engage a second locator recess on said inner surface ofsaid frame to an opposite side of said nose bridge from said firstlocator recess.
 6. The eyewear of claim 5 further comprising a firstlocator tab positioned below said first locator pin for engaging a firsttab recess on said inner surface of said frame, and a second locator tabpositioned below said second locator pin for engaging a second tabrecess on said inner surface of said frame.
 7. Eyewear for use both insports and in casual activities, comprising: a frame shaped to fit awearer's face, said frame having an inner surface, an outer surface, apair of orbital openings for surrounding the eyes of a wearer, a nosebridge connecting said pair of orbital openings, said nose bridgeincluding a ventilation opening containing air permeable foam forpreventing the ingress of particulate matter, a lens mounting surfacemounting a lens over each orbital opening, a temple bracket on each sideof the frame for attaching a means for supporting the frame on thewearer's head; and, a removable sealing member having a pair of orbitalopenings connected by a nose bridge of substantially the same size andshape as said orbital openings and nose bridge of said frame, a frontsurface formed to closely engage the inner surface of said frame, a rearsurface, attachment means for removably attaching the front surface ofthe removable sealing member to the inner surface of the frame, achannel formed in said nose bridge of said sealing member in a positionto be aligned with said ventilation opening of said frame when saidsealing member is attached to said frame for diverting an airflow fromsaid ventilation opening across an inner surface of each said lens, anda gasket covering the rear surface of the removable sealing member forengaging a wearer's skin around the eyes.
 8. The eyewear of claim 7wherein said gasket is formed from air permeable foam.
 9. The eyewear ofclaim 8 wherein said gasket is a wraparound foam gasket.
 10. The eyewearof claim 8 wherein said removable sealing member includes one or moreventilation openings extending from each said orbital opening to aperipheral edge, said ventilation openings covered by said foam gasketto prevent the ingress of particulate matters.
 11. The eyewear of claim8 wherein said means for supporting the frame to the head of the wearercomprises an elastic strap having a first and a second end, said firstend mounted to said rear surface of one of said temple brackets, andsaid second end mounted to said rear surface of the other of said templebrackets.
 12. The eyewear of claim 7 wherein said means for supportingthe frame to the head of the wearer comprises a temple bar hingedlymounted to the rear surface of each temple bracket, said temple barshaped to fit a user's head in a region above and behind a user's ears.13. Eyewear for use in sports and casual activities, comprising: a framehaving an inner surface, an outer surface and at least one lens mountedtherein wherein said frame comprises a nose bridge for supporting theframe on a wearer's face, and wherein said nose bridge comprises aventilation opening therein; and a removable sealing member having afront surface formed to closely engage the inner surface of said frame,a rear surface, and one or more fasteners for removably attaching theremovable sealing member to the frame, wherein said sealing membercomprises a gasket on at least a portion of said rear surface forengaging a wearer's skin.
 14. The eyewear of claim 13, wherein saidventilation opening is filled with air permeable foam.
 15. The eyewearof claim 14, wherein said ventilation opening in said nose bridgeextends through the outer surface of said frame.